body{
    background-color: rgb(250, 250, 250);
}
.layui-container{
    background-color: whitesmoke;
    padding: 20px;
    border-radius: 20px;
}
header{
    padding: 20px 0;
    text-align: center;
    font-size: 50px;
    font-family: 新宋体;
}
img{
    width: 300px;
    height: 300px;
}